1893.] NATUBAL SCIENCES OF PHILADELPHIA. 533 



beneath at apex, reddish ; apex of femora, arid tibiae and tarsi en- 

 tirely, reddish-yellow; front, face, clypens and thorax with silvery 

 pubescence, that on the front and dorsulum approaching to golden; 

 abdomen with silvery pile on apical portion of segments; wings sub- 

 hyaline, iridescent, nervures testaceous; marginal cell subtruncate. 

 Length 5 \ —7 mm. 



Camden County, New Jersey in July; Georgia; Texas: Illinois. 

 Resembles greatly mundus,hut may be at once distinguished by color 

 of legs. 



LYRODA Say. 

 Lyroda Say. Journ. Nat, Hist. I, p. 370. 1836; Kohl, 1. c. p. 266. 



Mandibles distinctly notched on outer margin; antenna; elongate ; 

 eyes with the inner margin, almost straight, not converging towards the 

 vertex, nearly parallel ; front and vertex without protuberances, not 

 raised along inner eye-margins; ocelli round and distinct, including 

 the posteriors, and are placed in the form of a low triangle ; top of pro- 

 thorax rather angularly produced medially, on each side of the produc- 

 tion roundly emarg 'mate ; (the top of prothorax reaches the level of 

 the dorsulum); anterior wings with a distinctly truncated marginal 

 cell which has an appendiculation, three submarginal cells, the second 

 of which receives both recurrent nervures, the basal vein joins the 

 externo-medial vein, stigma large ; tibia? and tarsi spinose, but not 

 strongly so ;comb of fore-tarsi short and feeble; middle tibia? one-spurred; 

 pulvilli large ; last dorsal segment of 9 with a large, pygidial area, 

 which is covered with a short pubescence. 



But few species of this genus' have been described, two of which 

 are found in Boreal America. They may be tabulated as follows : 



Anterior margin of clypeus of* 9 armed with three distinct teeth lat- 



*■ rally; wings clear, dusky at tip; form rather slender with silvery 



pile on abdomen; $ similar to 9 1 but smaller, the clypeus with 



its fore margin strongly bilobate medially, not dentate laterally . 



subita. 



Anterior margin of clypeus of 9 not at all dentate laterally; wings 

 dark fuscous; form stout, deep black, without silvery pile on ab- 

 domen; $ unknown triloba- 



1. — Lyroda subita Say. 



L. subita Say, Journ. Xat. Hist. I, p. 372. 



9 . — Anterior margin of clypeus truncate medially, armed later- 

 ally with three distinct teeth ; front and vertex with very fine and 



